SchemaConstraintNode class

The ConstraintNode type is provided to support usecases in which a node in a structured data graph is described with properties which appear to describe a single entity, but are being used in a situation where they serve a more abstract purpose. A SchemaConstraintNode can be described using SchemaconstraintProperty and SchemanumConstraints. These constraint properties can serve a variety of purposes, and their values may sometimes be understood to indicate sets of possible values rather than single, exact and specific values. See https://schema.org/ConstraintNode

Constructors

SchemaConstraintNode({dynamic constraintProperty, int? numConstraints, String? additionalType, String? alternateName, dynamic description, String? disambiguatingDescription, dynamic identifier, dynamic image, dynamic mainEntityOfPage, String? name, SchemaAction? potentialAction, String? sameAs, dynamic subjectOf, String? url})

Create a new instance of SchemaConstraintNode

Properties

additionalType ↔ String?

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getter/setter pair

alternateName ↔ String?

An alias for the item.

getter/setter pair

constraintProperty ↔ dynamic

Indicates a property used as a constraint. For example, in the definition of a SchemaStatisticalVariable. The value is a property, either from within Schema.org or from other compatible (e.g. RDF) systems such as DataCommons.org or Wikidata.org.

getter/setter pair

description ↔ dynamic

A description of the item.

getter/setter pair

disambiguatingDescription ↔ String?

A sub property of description. A short description of the item used to disambiguate from other, similar items. Information from other properties (in particular, name) may be necessary for the description to be useful for disambiguation.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

identifier ↔ dynamic

The identifier property represents any kind of identifier for any kind of SchemaThing, such as ISBNs, GTIN codes, UUIDs etc. Schema.org provides dedicated properties for representing many of these, either as textual strings or as URL (URI) links. See background notes for more details.

getter/setter pair

image ↔ dynamic

An image of the item. This can be a SchemaURL or a fully described SchemaImageObject.

getter/setter pair

mainEntityOfPage ↔ dynamic

Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details.

getter/setter pair

name ↔ String?

The name of the item.

getter/setter pair

numConstraints ↔ int?

Indicates the number of constraints property values defined for a particular SchemaConstraintNode such as SchemaStatisticalVariable. This helps applications understand if they have access to a sufficiently complete description of a SchemaStatisticalVariable or other construct that is defined using properties on template-style nodes.

getter/setter pair

potentialAction ↔ SchemaAction?

Indicates a potential Action, which describes an idealized action in which this thing would play an 'object' role.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

sameAs ↔ String?

URL of a reference Web page that unambiguously indicates the item's identity. E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website.

getter/setter pair

subjectOf ↔ dynamic

A CreativeWork or Event about this Thing.

getter/setter pair

url ↔ String?

URL of the item.

getter/setter pair

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJsonLd() → Map<String, dynamic>

Serialize SchemaConstraintNode to JSON-LD

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited